NEW YORK -- The Yankees are in discussions with free-agent left-hander Andrew Miller, according to multiple reports, indicating that they aim to maintain their bullpen as a strength of the club moving forward.

ESPN was the first to report that the Yankees are in "serious pursuit" of Miller, who was a combined 5-5 with a 2.02 ERA in 73 appearances this past season for the Red Sox and Orioles, striking out 103 with 17 walks and 33 hits in 62 1/3 innings.

The Yankees have not commented on the reports. The pitcher's agent, Mark Rodgers, told the New York Post that negotiations are underway with several clubs and did not characterize the Yankees as front-runners.

"I am talking to several teams about Andrew, and it has been fairly widely reported that the Yankees are one of the teams interested," Rodgers told the newspaper. "They are still interested, but I will not elaborate on the talks. There is a natural progression ongoing and we are sorting through the issues."

The Red Sox and Tigers have also been reported to be interested in the 29-year-old Miller, who was dealt by Boston to Baltimore at the Trade Deadline in July. ESPN reported on Monday that the Dodgers, like the Yankees, also were in "serious pursuit" of the free-agent left-hander.

A pursuit of Miller could suggest that the Yankees' hopes of re-signing closer David Robertson are dimming. Robertson turned down a qualifying offer from the team last month and is said to be in the market for a deal approaching four years and $50 million. If Robertson signs elsewhere, the Yankees would receive Draft-pick compensation.

Despite an underwhelming offensive season, a strong bullpen helped keep the Yankees in the postseason chase into September. Rookie All-Star Dellin Betances excelled while setting up for Robertson, who converted 39 of 44 save chances in his first season in Mariano Rivera's old role.

Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.